HISTORICAL NOTE: The term "character set" was originally used in MIME to describe such straightforward schemes as US-ASCII and ISO-8859-1 which consist of a small set of characters and a simple one-to-onemapping from single octets to single characters. Multi-octetcharacter encoding schemes and switching techniques make the situation much more complex. As such, the definition of this term was revised to emphasize both the conversion aspect of the process, and the term itself has been changed to "charset" to emphasize that it is not, after all, just a set of characters. A discussion of these issues as well as specification of standard terminology for use in the IETF appears in RFC 2130.